Well, finally got all the plumbing issues resolved. Found that my alt bracket would nt work, so I had to get a cheezy chrome deal but BUT......

the ol' 67 now runs a 427 3X2, and although there is some small tweaking to do ( mainly I went too big on accel pump on the center carb), man it ran MINT out of the box.

Faster than the 850? Hmm, hard to tell, but that 850 was tweaked to perfection. I can tell that for driving around town I dont need nearly the pump shot that the 850 needed, so I imagine it'll work out that the RIP might be the same as an 850 ( it feels slightly better now, without any tuning yet), but if I can actually squeeze decent open road milage out of it, it'd be a huge bonus.

Anyway, if anyone wants to setup a tripower using new Holley carbs on a mechanical setup, I have the correct reciepe. Total cost was $400 for mani, $777 for carbs, $200 for air cleaner, $50 for misc gaskets, fuel fittings etc.

You must run a small base distributor BTW. none of those fugly HEI's allowed. http://www.chevelles.com/forum/wink.gif

I think this setupo is puuurfect for you folks running big rats that might actually need 1135 cfm, and want a bit of a resto deal going on.

THNX to Shaun ( BLT4FN)for giving me a hand before the shakedown run.

------------------
Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

[This message has been edited by 427L88 (edited 04-23-2001).]

'ya gunna post any pics?

------------------
Dale
Lowered '67 Elcamino
ZZ430HP / 4L60
"Canyon Carver"
www.chevelles.com/showroom/elkydriveway1.jpeg (http://www.chevelles.com/showroom/elkydriveway1.jpeg)

Dale, I have to take some. I'm bad at getting pics for some reason.

If I had the time I'd motor on up with the station's digital camera and hook you up.

So how does it feel to know that when everyone whips around to see what the sound is, they are all looking at you?

------------------
Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! <oo=+=oo>

Fran, honestly, I had the 850 so right, that I just dont notice. No air filter yet ( custom job from K&N), so yesterdays test was just a quick shakedown test.

I think Shaun liked the rip of it though. http://www.chevelles.com/forum/eek.gif

------------------
Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

That will certainly be something to see come chevellebration time!!!

Can't wait.

Are you allowed to call it a "6-pack" or is that tabu? http://www.chevelles.com/forum/smile.gif

------------------
71' 3880# with me. Big Block 402, TH400, 3.73 posi,
13.1sec @ 105 MPH (poor 2.1 sixty foot and rookie tuning)
--will be racing at Chevellebration 2001!--
Picture of me roasting the tires and other guy stuff (http://www.auburnextremeracing.org/drivers/mike/)
Video of me staging (smoke of course) (http://www.notabusinessracing.org/videos/mike_chevelle_burnout.avi)

Thnx Quadzilla for the assist...Mike, "TRIPOWER" is the proper terminology. http://www.chevelles.com/forum/wink.gif

Well, here's the pic......something you dont see everyday, eh? ( linked it )

http://www.chevelles.com/showroom/gene427tripower.jpg



[This message has been edited by 427L88 (edited 06-23-2001).]

Sweet! http://www.chevelles.com/forum/biggrin.gif

------------------
Dave Knapp
TC #388
ACES #3474
SCCCC #310
'70 SS 396 (http://www.chevelles.com/showroom/DaveK1.jpg)
L34 (http://www.chevelles.com/showroom/DaveK2.jpg)

Waaay Cool, Gene. You get those suckers dialed in and you will like it better than the 850!

That's my next project. Just wait. I'm sure I'll be in touch. Now, which one to put it in, the 67 or the Vette?

------------------
-Mark TC# 717
ACES #1641
1967 Chevelle SS396/375 (http://www.chevelles.com/showroom/1BadRat2) Non-matching numbers but it is a 67 L-78.<A HREF="http://www.chevelles.com/showroom/1badrat3.jpg" TARGET=_blank>
1967 RailVelle</A> Handles like its on rails!
1964 Chevelle 283/195
1975 Corvette 396/375 (http://www.chevelles.com/showroom/1BadRat1.jpg) Sleeper

[This message has been edited by 1BadRat (edited 04-24-2001).]

I'm green. http://www.chevelles.com/forum/biggrin.gif

Mark, as far as I'm concerned these puppies were only made 3 years 67-8-9 and therefore it would only be fitting to fit it to your 67! NOM anyway right? So heck with the L78 deal, make it a "cancelled" L67!!!

I digress, but I hesitate calling this an L67 car becuase I would presume the dicountinued L34/L67 options were for oval and rectal port 396 motors , not 427s.

Anyway, I'd love to try my hand at a regular Vette one ( vacuum outboards), but so far I must say the Ford style mechanical setup is not real finiky at all. The only thing I;ve heard about the Vette ones is that if the vacuum pods are hosed so are you since they arent avaialble. Also, most real beefy apps require you to drill out the fixed metering passages in the secondary metering blocks.

Other than those two issues. Damn piece of cake.

EDIT: Oh and Mike, dont be green man. You gots plenty of time young man. Plenty. You still may be able to whoop the ol 427trips car on Friday June 8th! ( and I wont have a chance to dial it in at the track before then either).

Frankly, I'd be real happy if I could pull 14 mpg out of it.

Quad, I was real surpirsed this thing pulled as strong as it does to almost 7000. It is decidedly NOT high rise. But the runners sort of dip into the valley so there is length and volume.

------------------
Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

[This message has been edited by 427L88 (edited 04-24-2001).]

[This message has been edited by 427L88 (edited 04-24-2001).]

Yeah I'm even thnking about it as an option for the future. A nice radical high winding rat on a close ratio stick and a steep gear and some forced induction... pikes peak baby!!

------------------
Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! &lt;oo=+=oo&gt;

Thatlooks incredible. Nice Job! http://www.chevelles.com/forum/cool.gif

Oh Mahn!!! Very Nice!!! The plumbing is top notch! Hmmmm, now I wonder if that lil 307 of mine could handle that... http://www.chevelles.com/forum/biggrin.gif http://www.chevelles.com/forum/biggrin.gif yah, right! http://www.chevelles.com/forum/smile.gif

------------------
Better Late than Never Fred
Team Chevelle #400
ACES #4055
Denton ...The home of happiness.
1970 Chevelle Malibu (http://www.chevelles.com/showroom/Riffers70_1)

Fred, acutally, I'm going to put another 2 small bends into the piece that runs across the front into the regulator, just so its perpendicular to the engine.

And it doesnt look as if I need the fancy Holley 12-454 fuel pump. Guess that ol AC is still doing its job.

THNX guys. Remeber one thing, IF I CAN DO IT ANYBODY CAN.

------------------
Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

Wow Gene, those look killer. I know you have been wanting those for a very long time, I remember you telling us about them a few years ago. They look good, I hope you get them running just as good http://www.chevelles.com/forum/smile.gif

------------------
Bryan Shook
My website with lots of classic cars (http://www.geocities.com/elcamino_1972)
1972 Chevrolet El Camino Options, Codes & Pricing (http://www.geocities.com/elcamino_1972/elky-options.html)
Favorite Quote: Some people have shrinks. Some people have their garage.

Gene - If that set-up runs as good as it looks, that is going to be one sweet package. If I didn't know any better, I would think that you have put one of those things together before!

Mike

Awesome man http://www.chevelles.com/forum/smile.gif! That looks great. I had a Offy w/ 3 Rochester's on my car when I bought it. The outer two carbs were linked to the choke on the dash! http://www.chevelles.com/forum/biggrin.gif Still have it just incase I get the urge to put it on again..

you are the freakin' MAN

Georgia69, no, I'm not. 509Camaro got me all hooked on the trips deal and his good friend Donnie ( the Ford man) actually guided the design. I just cloned the one Donnie made for 509. 509 did alot of the fab work ( like throttle linkage, some carb cutting etc) as well.

I'm telling you guys, these things work real well. As BLT4FN said, if its this good without tuning AND it can give better mpg, man!.

72 Bu' TO THE DASH!!! Hahaha, thats wild! http://www.chevelles.com/forum/biggrin.gif

------------------
Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."



[This message has been edited by 427L88 (edited 04-24-2001).]

If I knew how to attach pic's like you guy's do when you post I could show it to you ! It was a gas guzzlin' induction rorin' top end mother! Still is w/ a 4bbl but not as much induction noise http://www.chevelles.com/forum/smile.gif

Gene, Looks good. Is that manifold polished? I'm looking forward to seeing it in Nashville. I want to see you and BB_Mike go at it on the strip. "Friday, Friday, FRIDAY NIGHT AT MUSIC CITY RACEWAY!"

------------------
von '69 300 Dlx SS TC #15 ACES #1575
My '69 SS (http://sites.netscape.net/von69ss/homepage)

Von, yes it is polished. Covered by a 1/2" phenolic heat plate, but polished nvertheless.

Yeah, I have no idea how fast the car is, but I dont think its very, so Mike and I will have a great heads up race. ( kinda a jab at Mike, hehehehe).

[This message has been edited by 427L88 (edited 04-24-2001).]

Too cool.... That looks great!.... Does it sound any different to you? or is the exhaust note covering it up?

------------------
You can sleep in your car,but you cant drive your house.
Tony. H . 406 powered , Mohave Gold , 72'Malibu

BAAAAAAAAAAAAAAAAAAAAAAAAD ASSSS! http://www.chevelles.com/forum/biggrin.gif

very impressive Gene,nice job

Good Lord! That looks so good, I may have to have smoke afterwards! :0

------------------
David Reinecke - aka - FINE 68
1968 Chevelle 300 Sport Coupe Deluxe
www.geocities.com/jdreinecke (http://www.geocities.com/jdreinecke)

extremely nice gene...
if you get 14mpg i think thats the way to go
keep us advised

are all you guys talking about going to chevellabration??
if a big group is going then i may go to tho i would fly in


------------------
Rich
Cocoa Beach, Fla
Team Chevelle #380
wa3men@aol.com
www.chevelles.com/showroom/70_SS_454.jpg (http://www.chevelles.com/showroom/70_SS_454.jpg)

Gene..that is damn sweet. Can you post specifics & such? Don't recognize the intake, who makes it? Square port, right? What's the part # on the Holleys? And the fuel line, was that pre-bent? Is it Holley linkage for a Ford? I've toyed with idea of a mechanical tri-power set-up, but there's not enough room on a Chevy TP intake for 3 mechanical carbs. What kind of air cleaner are you using? Am I asking too many questions? Thanks.

Triplets! Soooooooo Cute!!!!!!!! http://www.chevelles.com/forum/biggrin.gif

------------------
Nick P.
Team Chevelle Gold #36
http://people.ne.mediaone.net/nicpal/home.htm www.chevelles.com/showroom/Nick's1970ChevelleSS396.jpg (http://www.chevelles.com/showroom/Nick's1970ChevelleSS396.jpg)

Congrats Gene! That's been a long time in coming and the results look killer. Nice work.

------------------
502 Rat Infested 1970 Malibu - Gold Member #39
Keep America Beautiful - Drive A Brute Force Chevelle!
http://homepages.about.com/wescolby/1970bruteforcechevelle

Larry what is TP??

Only BB tripower intake I know of is the Winters casting for 1967-1969 Vettes. There are sb trips avail too, but think they use the smaller base Rochester 2GCs. I have the low buck, not too rare low rise 435 HP version.( rectal). Most rare is high rise oval version becuase of low production # in 1967. I paid $400 for mine a few years ago ( i bought it before the Chevelle came along http://www.chevelles.com/forum/wink.gif). Nowadays maybe 500-600.

Air cleaner is also GM item. Repos are around $450. I Lucked out as a kind samaritan saw my buildup here and offerred me what turned out to be a very good base and lid for $200. GOD BLESS CANADIANS!

You can run 3 single small cleaners but I think there is a reason you see these on 289,283, 327s. They dont flow. Stock Vette element is actually a foam deal, so high cfm but no cleaning. Their hoods are so tight they can only fit a 1.75" element. It had to be foam just to get some flow. For EG, a 3.5" K&N flows about 950 cfm, so you can imagine. Here you defintely want a K&N E-1970, custom height. About $88.

Carbs are 4412's. You can scrounge the parts, You need 3 2300 2 bbls and 3 1850 600 cfm frontfloat bowls. I took Doug Flynns advice and called Holley custom and they did me a custom deal where they took a reman 4412 ( the new 2300 series 2 bbl) and put the side hung float bowls on, 30cc pump, milled the air horn, plugged the rear vaccum port. Came to about 240-250 a piece, $777 with tax, delivered.

If you run power brakes leave the rear port on. Also Donnie the Ford man ( the trips expert up here) likes to restrict the PV bores in the center carb to approx .058. Some metering blocks do actually come that way. Of my three, 2 measured .063 and one measured .058. So I used the smaller orifice one in the center with a power valve.

Center carb mount has a pcv port that is exposed, a valley if you will. You must use the Holley 2300 gasket with the bumps on the sides to cover this. Also the carb base does not cover it, you'll need a steel shim gasket or, a carb spacer to seal this. Its exposed for about 0.050-.100 off the carb base.

Set the carbs JUST like a 750 DP with no secondary PV. Nominal setting is 71 primary jets, 105 ( yes I know I run a 095 and I can tell it wuld like a 105) PV. No PV on outboards and run 78 jets. Idle on all 3 if you'd like, but I tipped in the outboard accel cams quick and am going to try center idle only.

509 Camaro fabbed the linkage cloning his now discontuniued Edel item. ( Com'on Vic!). I'm sure a Ford FE one would work ( about $60 at the local Ford resto house) and Offy makes them as well.

The Ford version used a fuel log and 3 rubber lines to the carbs. I can see the advantage of the fuel log since in my plumbed setup the rear carb seems to get the straight shot. When setting floats, I had to dial that one down almost until it bottomed.

I had the thermo housing Jet Hot coated cause it so darn close to the carb.

Other than that --- ITS PLUG AND PLAY! http://www.chevelles.com/forum/biggrin.gif

I;ve already found out that tinkering is not fun with these, you gotta pull EVERYTING apart. No more slit soda pop can to catch the fuel as you pull a bowl off to change jetting or PV.

And the linkage is tricky. Shaun ( BLT4FN) and I found we couldn't get the secondaries to stop flowing at idle, until I reset the center-to-center distance on the linkage. Wierd.

But I say again, if I can do it, anybody can.

K thats it, More , search under my username over the last few months, key word "trips" or "tripower". I might have put some psots up in Bench only because I felt this inst really a Chevelle deal for some reason.

IT DAMN WELL SHOULD"VE BEEN! http://www.chevelles.com/forum/mad.gif damn GM mangement.

I want to thank Wes Colby, 67Rat, Tom Mobley, Bob Tiley, and everyone else who gave me Holley tuning advice over the last year. Setting up two dps from scratch was an excellent intro to dealing with the trips and I thank you all much.

And 509Camaro and his Ford buddy Donnie, the genius. If anyone wants one built, cough up a manifold and get in touch with Donnie, I think he 'll do one from scratch if you want. Gotta figure on about $1000-1500, but dont quote me.


[This message has been edited by 427L88 (edited 04-25-2001).]

Larry,

There is a guy on the board here who has a tri-power with the three Corvette carbs mounted on a small block 3x2 manifold. Get this! It has an HEI in it! There actually is room if you don't mind dinking around a little with the mounting. He had pictures of it posted here on the site, it is killer.

I want to build one of these, Edelbrock is still selling the manifold, it's for 2GC's but I can make the Holley's fit now that I know it can be done.

Interested in getting involved in a project?

tom.mobley@chevelles.com

Tom

edit: here's the links to the pics-- www.chevelles.com/showroom/Schurkey1.2jpg (http://www.chevelles.com/showroom/Schurkey1.2jpg) www.chevelles.com/showroom/Schurkey3.jpg (http://www.chevelles.com/showroom/Schurkey3.jpg)
www.chevelles.com/showroom/Schurkey3.3.jpg (http://www.chevelles.com/showroom/Schurkey3.3.jpg)

I like the looks of this deal.



[This message has been edited by Tom Mobley (edited 04-25-2001).]

Tom, I like the water outlet placement on that mani. Mine is too close. 509Camaro had to cut a chunk of his therm housing out and weld to clear.

Buy a Dave Ray unit and make it look right. Its tight enough back there!

Oh and Tom, Dinking around is the name of the game with these "custom" setups anyhow. Die grinder in hand, " gimme that carb" . Also encourage you to do a mechanical deal. I mean mine was WOT mint out of the box. None of this spring bs to contend with, irregular/imbalanced opening rates, etc.

Heres a place with some linkage, fuel rail stuff, kinda spendy though...

http://www.parts123.com/PartFrame.asp?ZTM=cadegdha&GHOME=www.vintagespeed.com&TITLE=VINTAGE_SPEED



[This message has been edited by 427L88 (edited 04-25-2001).]

Yep, the HEI can be made to work with the Offy small block 3X2 manifold. Tremendous pain it the tuckus, but it works. These are not Corvette carbs, rather Nopar 440+6 carbs from '71. (fuel inlet on right side, not left side as Corvette) and as stated above, Offy manifold not Edelbrock. I'd like to try the Edelbrock manifold for grins. Everything clears stock flat hood on '68 El Camino, as well as '69 Impala and '65 and 66 Impala. I've used this tri-power on 283, 350, and 400. My buddy had it on a 327, also. Very flexible, responsive, and reletively thrifty to boot.

See Chevelle Showroom for my trial assembly photos:
http://www.chevelles.com/showroom/Schurkey1.2jpg
http://www.chevelles.com/showroom/Schurkey3.3.jpg
http://www.chevelles.com/showroom/Schurkey3.jpg

[This message has been edited by Schurkey (edited 04-25-2001).]

Double post, sorry.

[This message has been edited by Schurkey (edited 04-27-2001).]

HEI fits just fine on my 65 Elky w/67 Vette Tri-Power. Its all factory with the exception of the new fuel lines I made. They are as close to factory as I could get. http://people.ne.mediaone.net/bates150/images/bb_tripower_l.jpg

Should have taken a photo with the air cleaner off, will do that tonight just for reference.

[This message has been edited by David_Bates (edited 05-01-2001).]

[This message has been edited by David_Bates (edited 05-01-2001).]

David, encourage you to try the custom height K&N air filter.

Wow. And I thought I had it tough tuning my single Holley 4150.

Looks great!

------------------
NCOA member #220
ACES member #1670
Team Chevelle #998
Rich's 1965 Malibu SS Restoration Project Progress Page (http://www.geocities.com/ticklewiggle/)
1:18 scale diecast car Detailing by Scooter (http://www.amhost.com/scooter/)

<BLOCKQUOTE>quote:</font><HR>Originally posted by hoffbug:
Does it sound any different to you? or is the exhaust note covering it up?

<HR></BLOCKQUOTE>

WWWWAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHH!

Sounds good to me! http://www.chevelles.com/forum/biggrin.gif

Gene, looks awesome, a real class installation and finish! http://www.chevelles.com/forum/biggrin.gif



------------------
"Details Make the Difference"
Musclecar Restoration and Design

Whoops, two posts, sorry! http://www.chevelles.com/forum/frown.gif

[This message has been edited by Rick_Nelson (edited 04-25-2001).]

Gene, thanks for the info. Sorry about the confusion, TP meant Tri-Power. Ignore my previous ramblings. I think I've figured out my own confusion after looking at your pic again and comparing it to a Vac sec. set-up I saw at Carlisle last weekend ($2500). The configuration and fuel bowls are quite different.

I should've recognized that your intake is GM, but I can count the number of "Trips" I've seen on a hand and a half, so I'm still getting acquainted with the breed. Don't know yet if I'll take plunge; there are so many other things to spend bucks on.

Again, excellent job, looks factory.

Larry, was it you thattold me not to use singl flares on seamed tubing. Well, thats why I;m not out tonight. Fuel leak. Just a few on/offs and one of the flares didntlke it. I dont have any tubing left. I'll have to practice my doubles.

gene,

you can get little dead soft copper sealing washers that are already formed with the flare angle from NAPA and others. They're in the AC catalogs, there were used for sealing up leaky Freon fittings and the like. Work on anything with flare fittings. But, if you did single flares, these are prone to cracking eventually.

Tom

Schurkey, thanks for answering up, I had a terrible time coming up with those links for your pictures.

I still haven't come up with any carbs, still looking. I may just take 3 4412's and convert them to 4160 style, do away with the metering blocks on the front and rear carbs. I've got a couple 4412's I could look at, just need to do some drilling and tapping for the metering plate screws. I just haven't found any reasonably priced vacuum carbs, which I would prefer.

I actually prefer the 440 carbs because the fuel lines are on the right, but can't find those cheap either. Drat.

Tom

So Gene when are we going to see that rat with its Top Hat on? I'd like to see how the mill and airfilter fill out the bay.

------------------
Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! &lt;oo=+=oo&gt;

Gene, those carbs are a thing of beauty! Even if it was SLOWER with 'em it would be worth it... to have it be just as fast or faster is a bonus! http://www.chevelles.com/forum/biggrin.gif

Great job!

Big O Dave

------------------
God, Family, Country, Chevrolet... and Volvos with Small Blocks in them. To paraphrase the Chrismas carol:

"Oh what fun it is to ride with a HIDDEN Chevrolet!"

Quad, I have a OEM Vette air fileter which is a big POS. Total POS. I cant believe they ran them &gt; Junk. The K&N is on order but since its a custom height ( 3.5"), its going to take a bit. ( 4-6 weeks). I pleaded with them to get it here before the end of May. I dont want to run this car down to Chevellabration with the "no filter" Vette filter.

Guys dont waste your money on a Vette filter. Same foam crap that I ran as a kid ( those triangualr "hi flow" air cleaners) and put alot of wear on my LT1. The 3.5" K&N flows 950 cfm, I would assume the stock height 1.75" flows less than 800 cfm. K&N part number E-1970. Here is one app that I definitely would use K&N.

Gene, I'm sitting here reading an August 1968 Popular Hot Rodding. There was a vendor, Segal Automotive Products, that listed a tri-power air cleaner that had less restriction on your application, plus they also offered a ball bearing progressive mechanical linkage for your setup. The air cleaner was more like the old Shelby setup and used a paper filter. I'll have to scan or photocopy it for the next time I see you.
Your setup looks mighty fine. It's enough to inspire me to run a trio of Rochester 1 barrels on my L6, or even a 6-pack of Stromberg 97s on an old intake and run it on a punched-out 283! Really though you have the penultimate setup. You have a great combo with just the center carb for 'ecomony' or a full 1150 cfm when you want to use up last winter's gas out of the snowblower really fast.
BTW, if you ever ran the Segal linkage you'd have to get rid of the Tonawanda sticker in lieu of the Segal sticker. that may not be eay to do in your neck of the woods.

Gene that setup looks mighty fine. I'm seriously thinking of doing the same thing with my Camaro.

------------------
'69 RS SS 396 375hp L78 Convertible, M22, 3.31 posi, deluxe interior, gauges, rosewood wheel, AM-FM,fold down seat, tilt wheel, SS wheels, console mounted 8 track player, chambered exhaust
http://albums.photopoint.com/j/AlbumIndex?u=1169124&a=8603468
Former Fathom Green '69 Chevelle SS 396 4-speed owner

well good news /bad news. I pulled the front carb to cutoff part of the throttle arm which was interfereing with my linkage.

I tightened up the carb and mani bolts. The mani bolts were odd, although I crept up on the finaly torque spec, I found some loose and some damn tight.???

Anyway, I snugged up all the bolts ( lightlyot hrosing them), installed the fuel line I had Classic Tube do ( $40 I shoulda done before), and got ready to take her out for a ride on 4/27, how fitting!

Wrong. Cant get it to idle worth a damn. Could I have set up a vacuum leak on the intake by snugging up some loose bolts, did some crap get into my carb ( center only), was there some stuff in the new fuel line, which I didnt rinse out with hot h2o like my home made job..??
I know what it is...BLT4FN, get your ass back down here, man it went soooo smooth with you around, I need your karma.....

Anyway, I have no idea what has transpired as that car sat for a week. with the only changes some minor bolt tigghtening and r/r of the front carb an ddition of a fuel line that dont leak. What the heck???? http://www.chevelles.com/forum/confused.gif

Guess I'll have to pull the whole shooting match off, dissassemble every carb and clean it, after I fire it and check for vacuum leaks.

Gene, You need to record the sound of the tri-power and link it onto here so all can hear the sound it makes WIDE OPEN!! My buddy has trips on his 69 Z/28 and I had a 71 buick skylark I had a BBC in with trips, was a blast, even drove it from NY to FL, no problems. Heres a link to some pics of the camaro... http://msnhomepages.talkcity.com/yosemitedr/quintillis/page7.html (http://msnhomepages.talkcity.com/yosemitedr/quintillis/page.7.html)

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http://msnhomepages.talkcity.com/yosemitedr/quintillis/index.html

[This message has been edited by GlennLS-6 (edited 04-28-2001).]

OK folks one more thing, if you decide to get your carbs from Holley custom shop like I did, make damn sure they install butterflies WITHOUT the air bleed hole. Cant get the setup to idle on center only because all the carbs have a little hole in each of the throttle plates. DAMN! So I;m running a 6 corner idle for now,. but this will hurt mpg. Have to either replace the butterflys or plug them holes somehow.

Well Gene, sound like a job for RTV for now.

------------------
Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! &lt;oo=+=oo&gt;

Hi, 427L88!

Outstanding tri-power set up (sharpest I've seen)! I don't have a Chevelle at present, I'm just visiting the Chevelle forum soaking up tech tips to incorporate on my '57 Chevy. Hope you don't mind me "sitting in" on the discussion, guys......

I love multiple carbs!!! I'll soon be building a (4) duece set up for the 427 CID stroker small block destined for my '57 Chevy sedan using a modified Offy intake. Will let you know how this works out.

Back in the '70's, my '65 GTO convertible got totalled. It ran a low mileage, later model 400 4bbl Pontiac engine and Muncie 4-speed. I really miss that car - it was a lot of fun. After the wreck, I built up the engine with a tri-power, Sig Erson cam, '68 428 cop car heads and swapped it into a '56 Chevy coupe. Ran great. Miss my '56 even more than the goat!

As reference, I took a '66 Pontiac tri-power intake and made a 1" thick aluminum plate, which was attached with (12) countersunk screws where the GM carbs had originally bolted on. I then drilled/tapped (12) new mounting holes for Holley bolt pattern. With the plate bolted to the manifold, I put it in a drill press, lined up the Holley throttle bore locations and bored (6) 1 3/4" holes all the way to the bottom of the manifold plenums. No flow obstructions like most "store bought" carb adapters. Picked up a set of new 440 Dodge 6-pak carbs (similar to 427 'Vette and 406 Ford carbs) from Chrysler dealer and bolted them on (still available new). Made custom air cleaner using aluminum base, polished stainless steel top and a couple '70 240Z Datsun filter elements stacked one atop the other. Ran great, looked trick! Never a problem (after I replaced my 5/16" fuel line with 3/8" and constructed a fuel log similar to the 406 Ford setup). Adapted GM factory progressive linkage that originally controlled the stock GM carbs on my Pontiac intake to actuate the Holleys. You could build a similar Holley tri-power setup for a small block Chevy using aluminum small block tri-power intake and adapter plate similar to my old Poncho setup.

Best regards,

Harry

Harry, Sir, that is WILD! Multiple carbs are really neat. The WOT performance is unparalleled ( and I have more mid range torque), and I hope that easy highway driving w/o cracking the secondaries yields some decent mpg.

Francis, read the back of the tube " not to be used in e gasoline environments". No RTV. JB weld or small screws maybe.

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Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

<BLOCKQUOTE>quote:</font><HR>Originally posted by 427L88:
Harry, Sir, that is WILD! Multiple carbs are really neat. The WOT performance is unparalleled (and I have more mid range torque), and I hope that easy highway driving w/o cracking the secondaries yields some decent mpg.<HR></BLOCKQUOTE>Thanks, 427L88!

I understand you're having problems setting idle due to butterflies not being solid style. Flat brass rivets might be an option to fill holes.

Are your end carbs set up like the Mopar carbs (no idle circuits, etc.)? My tri-power was really easy to set idle on because I had the factory (Mopar) Holley carbs and adapted GM progressive linkage. End carbs started opening when center carb was about 3/4 open and all three reached full open at same time. The '56 ran a '69 Camaro 12-bolt rear end with 3.07 highway gears - got around 19 mpg cruising at 70 mph on center carb. On the road, the end carbs would begin to tip in around 90 mph if I eased into the throttle without opening them earlier. Top end was near 135 mph.

Happy Motoring,

Harry

[This message has been edited by enigma57 (edited 05-02-2001).]

Harry, I am using reman 4412's with 1850 style float bowls. Done by Holley custom shop, redichromated, etc. I have idle curcuits on all 3 carbs if I need them.I can certainly tell that on 6 corner idle the "punch" you get is quite awesome. No hesitiation at all, not even a millisecond. And this is what the local trips guru ( a Ford FE man clearly!)recommended. I will seal those holes with a small bit of JB Weld after my inital jetting is tested a bit. ( Hey pulling those carbs is indeed a PITA! and I only want to pull them 1 more time). Then we'll set it up on center carb idle only.

Yeah EDEL used to make a fine $18 linkage which 509Camaro copied for me. The Ford FE linkage is around $60 here.

PS. I;d do cartwhells if I could squeeze 14 mpg out of it ( 3.55 rear with 28" tire).

Anyway, your input is valuable, I hope this thread will serve as an instruction set for those who might want to take a trip to the "retro resto" side and set up trips.

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Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

Even considering that the last 10 seconds of opreation was a cold start to move into the garage, i pulled my 6 easy plugs and found it running rich. Man, not nearly the pump shot or jetting of the 750 on that hollowed out Winters high rise.
I was a slacker last night http://www.chevelles.com/forum/frown.gif, I was supposed to be swapping out my mounts, but decided to JB my carbs and today, swapp out jetting to the original baseline specs of 71/78. http://www.chevelles.com/forum/smile.gif

Gotta "bit the bullet" and get my engine mounts swapped out.

Yes Sir you do need to swap them out. The last thing we need is a rabbid rat on a stick with out it's leashes on.

So assuming that you get the idle circuts taken care of and the jetting done, what kind of acceleration should we expect?

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Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! &lt;oo=+=oo&gt;

Fran , it aint no 10 second drag car , thats for sure.

time slips are for sissies, I'm interested int he instant and progressive G-loads. http://www.chevelles.com/forum/cool.gif

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Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! &lt;oo=+=oo&gt;

Quad, its goofy, i mean with the 6 corner idle , you nail it and there aint a millisecond of hesitation, ITS ON! Ask BLT4FN. Curious to see how the "center idle only" affects the transition.

Oh yeah, how about 2 loose engine mount thru bolts. HUH? that's friking trick. http://www.chevelles.com/forum/redface.gif Cant access the heads to tighten or get them out without a lift. Prolly should replace them with 8's becuase they be a little bent they be. MORON!

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Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

Well, the outboard carbs were sealed with JB weld so they cant suck air at idle. I also noticed the plugs were rich and jetted back.

Leaks are a real issue with hard lines as you can tweak the fuel bowl by torquing down the fuel lines when they arent quite centered in the inlets. Must pay attentnion to that detail.

IT DOGGONE RIPS! Much nicer easy driving throttle respnse and man, wot IS A DREAM. te leaner jetting made WOT much cripser. If it wasnt such a PITA I';d be tempted to jet down to 77, but well see after the MSD gets switched on.

Very nice setup these. I highly encourage their use. http://www.chevelles.com/forum/biggrin.gif

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Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

Well Gene, I'd love to but the 1.6 liter sentra would DROWN. http://www.chevelles.com/forum/biggrin.gif

I am very interested in a 3 duece setup, based on the the wealth of how to and how not to you've kicked up.

How about posting up a nice recipie with part names/numbers and rough costs and who to call.

What we need is a video of you burning them down, comeplete with the DrGas turbofan sound.

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Francis Taracido Gold# 201
sniper0666@aol.com
History shows again and again how nature points out the folly of man.
Oh No! You Know She's Got To Go!
Go Go Quadzilla! &lt;oo=+=oo&gt;

Well I guess the L88 idea is officially dead. Im mean even if I win the lottery and build a 540, I'll run trips. FOr a combination of RAW wot AND CRUISABILITY, THESE SETUPS CANT BE BEAT. nO WAY. nO HOW. (whops that wasnt deliberate, but i'll keep it in).

We hit a peak mpg of 15.7 en route to Chevelle-a-bration, giving us a cruise range of approx 300 miles a tank. No way that old 850 or even the 750, could touch that.

The primary jetting was lean. Anyone building one this way should start with 72s. Tne distributon in primary mode is uneven. Outboard cylinders burn lean.

The system is exceptionally sensitive to changes. I went from 71 to 72 s and dropped from a 33 to a 31 squirter in the primary carb. Man! It really smoothed out the car fro around town use. Feels like my parents ol '76 Eldorado. Smooth.

The other HUGE difference occured when I went from 31 to 28 squirters in the secondary carbs. WOW http://www.chevelles.com/forum/eek.gif I'm looking for a used 25 , i have one, and try it one step further. I might mess with the pump cam profiles and volumes, or set the arms with some gap. Its pretty good now. There is no bog or hesitation no matter when or where you nail it. going 30mph in 4th, or 30 in 1st.

Might fiddle with a vacuum setup someday, but with a stick car, and suspect autos as well, the mechanical setup really functions well and is, obviously if I can, pretty easy to dial in.

Make a mint toppper for a 540bbc, eh? http://www.chevelles.com/forum/biggrin.gif

Oh honey, theres a big box coming today, they'll put it in the garage. http://www.chevelles.com/forum/wink.gif

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Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

I had a factory one of those along time ago. The bottom end was a lot better than an 850 but it drove me crazy trying to keep it right. The carbs had some miles on them and a lot of wear. The under hood temp. on those vettes was real bad and it would warp the carbs enough to make them a real pain. The vacuum setup does work well if you can find the parts. Good luck

Gene,
15.7 MPG !!!! WOW, that is incredible. What gears do you have? What was your average cruising speed?
Does anybody else here have a bigblock/4-speed that can run in the 12's and get close to 16MPG????
Jim

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My 70 Chevelle (http://www.angelfire.com/pa4/jim/)

Jim, a qualified success, because when I went to pull my plugs to open up valve lash some, they were whitish. I went to one size bigger jet ( see above). Yesterday, I put 200 miles on the car, lots of horsing around, and a 60 mile highway cruise to and back - it drank a little under 16 gals ( 15.67).

The difference in mpg between highway cruise at 3250 ( 72-75 mph) and 2900 ( 62-65 mph) is dramatic. The 15.7 was clocked behind CFR trailering bewteen Cleveland and Cincinnatti at 60-65 ( just under 3000 rpms).

Oh I want a Richie5!

And only figure she'll do 12's, but that will be tested here in short order, on a 1/4 mile, because with 3.55 and rect ports on a small motor, it really has to build " a head of steam" so the last half of the track the pull is on. Last year, I ran a best of 8.36 on street tires at the 1/8.

All I know is, I cant wait to bolt these heads and tripower onto a 505!

509Camaro claims 14 mpg at cruise. And he's running an 11 second car WITH NO TUNING ( F body suspension kinda suck as compared to A BTW - at least in "stock" form).

Another caveat to potential trips builders. My idle was high. I did set it up higher at CB01 to help with a charging problem. No thats not it, somehow when I pulled the center/rear carbs to swap jets, my rear carb isnt closing up all the way. No big shakes, its either the outboard carb linkage, or the carb isnt quite centered on the spacer. Only point is, YOU MUST BE A STICKLER FOR DETAIL with one of these setups.

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Gene Chaas
Gold Member 62/ACES 3112
67 SS 427 (http://www.chevelles.com/feature/october2000.html)
"Be big. Be a builder."

[This message has been edited by 427L88 (edited 06-25-2001).]

Just an addendum. I swapped out the primary jetting to 72's ( maybe the MSD causes plugs to burn whiter??). Yesterday I had a run to rochester and back. Mostly highway, some city, just a few WOT blasts.

I'm thinking its an abberation. 221 miles, 12.55 gallons - 17.6mpg! WHAT? http://www.chevelles.com/forum/eek.gif

Dang, I dont know if the vacuum setups run this efficiently, but this is totally surprising.

The best 1/8 time last year on street tires with slip was 8.37. So far this year I;ve only run a 8.77, but with more mph, so I cant say its any faster, but man, I;ll take the nearly 18 mpg on the road. HOLY COW!

I cant believe how responsive to changes the engine is now. Opened up valve lash and bumped jetting. Takes less vacuum to run at 65 than before and man, this lil rat is running WICKEDLY efficiently on the road. WICKEDLY!

TRIPOWER guys, its the way to fly! For street rats , its MOST awesome.

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Member #62 Gold/ACES 03112
67 SS396(427-3X2) (http://www.chevelles.com/feature/october2000.html)
Be Big, Be a Builder

What's your trans and rear gear, Gene? Muncie, right? And what was your average speed on the trip.

I average just over 18mpg averaging 75mph with 3.73, 700R4, and a 355 w/Carter AFB & HEI.

I'm just trying to imagine what it would be like with an induction setup like yours.

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My Elky Page (http://www.geocities.com/chadjlandry/index.html) (updated 5-15-01)
"Think for yourself. Don't let popular opinion make your decisions for you."
Chad Landry
TC Member #643
ACES Member #04556
'68 El Camino

Hows the new one!? Its nice you have one of each, wish we did, but healthy is all that matters!

Yeah 3.55's, 28" big gumbos, and an M20. I cant even imagine what a 3X2 would do on the small block. I;ve been thinking about what a Richie5 would do with 3.23s!

3000 rpm = 65-ish or so. If I go 75 ish at 3250-3300, it throws mpg out the window, so I stick to posted speed if I want to conserve fuel.

Sarah's doing great (and so is her mom)! She's not too demanding (which is more than I can say for her brother), http://www.chevelles.com/forum/wink.gif and she's just beautiful. http://www.chevelles.com/forum/biggrin.gif

With my 235/60R15's I'm only doing around 2300 @ 70. Now I feel like a real fuel pig. http://www.chevelles.com/forum/eek.gif I got 22mpg on my trip to Houston last summer when I met up with Wes, Wayne, and the other guys. But that was cruising at 60-65 all the way and no passing or WOT blasts. I've yet to repeat that mpg.

Is that a progressive linkage with one 2bbl running normally and the others opening under WOT? I wonder what 2-deuces would do.....

I think you've surpassed EFI with that setup!



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My Elky Page (http://www.geocities.com/chadjlandry/index.html) (updated 5-15-01)
"Think for yourself. Don't let popular opinion make your decisions for you."
Chad Landry
TC Member #643
ACES Member #04556
'68 El Camino

Yes, its a mechanical progressive linkage and No I dont think I've surpassed EFI YET! Doug Flynn would know. He's an EFI engineer at Holley.

It sure would be nice to dial it in with my laptop and not have to un-plumb the thing everytime I wanted to tinker with jetting!

Oh, and Chad, my intake ports are too big, my headers are too big etc etc yadda yadda. http://www.chevelles.com/forum/wink.gif

Apparently NOT! ( at least for pure cruise efficiency)

[This message has been edited by Gene Chas (edited 07-10-2001).]

Gene,

Nice. TZ

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Tony Z
Team Chevelle Gold Member #358
Utica, NY
'67 Chevelle SS 454/TH400 3:73 posi
(here's a black and white until it's done)
http://www.zumpano.net/67chevelless3a.jpg
In the shop and slated for finishing later this month (July 2001)- yee ha!
Looking for a '70 - I have a motor and tranny ready.
azumpano@a-znet.com

<BLOCKQUOTE>quote:</font><HR>Originally posted by Gene Chas:


Oh, and Chad, my intake ports are too big, my headers are too big etc etc yadda yadda. http://www.chevelles.com/forum/wink.gif

Apparently NOT! ( at least for pure cruise efficiency)

<HR></BLOCKQUOTE>


You go right on thinking that! http://www.chevelles.com/forum/wink.gif



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racer's '68 (http://www.homestead.com/headsupchevelles/page13.html)

10.73@123MPH n/a
1.41 60 foot (new best)
3900 lbs.

<BLOCKQUOTE>quote:</font><HR>Originally posted by racer1320:

You go right on thinking that! http://www.chevelles.com/forum/wink.gif
<HR></BLOCKQUOTE>

You two boys are soooo naughty, taking swipes at each other like that. I'm gonna have to give BOTH of you the "granny grab" on the cheek (facial, in case BBD or Beldarr are around) and make you look each other in the eye until you both have to crack a smile. http://www.chevelles.com/forum/smile.gif

Don't think I won't be out there to do it, either!

BOD

No swipe here. Not my style. Dont think I've ever "took a swipe" at someone here. Enough of that foolishness around. My comments were meant to highlight the effectiveness of the tripower. I'm sure it would run just as well, if not better at low rpms, over oval ports. Pretty impressive cruise efficiency even for an "incorrect" combo was my point.

BTW, the 430ci I built is a typical well designed rect port combo, wide LSA cam, work on the exhaust, headers matched to rpm range/drivetrain, etc. Kinda like GM built them "back in the day". A street motor and it totally behaves like one. Whether there is a "better" combination is totally academic to me. This one fits the bill.

Anyway, I dont think I'm going to do much more test n tune of the tripower. This thread can be used to build one yourself no probs and thats what I meant it for. The trips runs as well at WOT as the Winters did, maybe a little slower ET ( I havent tried to match the 8.35 I ran last year on street tires yet), but the cruise efficiency is most awesome EVEN in a high rpm rect port small cube rat. I am very pleased with it and would encourage anyone to build one.

So there you have it. 3X2 is the way to fly for a street car, no doubt in my military mind.

509Camaro says he's getting 14 mpg open road with an inefficient T400 ( as comapred to a manual trans ). Thats with a Dart headed, solid roller 509. Dang, how can you beat that!

Oh, 17+ mpg out of a 430 ci rat in a big ol Chevelle! http://www.chevelles.com/forum/biggrin.gif

Anyway, between Shurkey, Mr. Bates, BULKSS, and me theres enough know how to get it done here. Hell, the Vette 3X2 guys never drive their cars! At least with Chevelles, folks will get to see them out once in a while!!!

Th th th Thats all folks! highly recommend the tripower if you want to be a little different http://www.chevelles.com/forum/cool.gif ( and save a bit on petrol! )


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Member #62 Gold/ACES 03112
67 SS396(427-3X2) (http://www.chevelles.com/feature/october2000.html)
Be Big, Be a Builder



[This message has been edited by Gene Chas (edited 07-16-2001).]